java中枚举类型的代码是什么呀?

using System;

public enum TimeofDay

{

Morning,

Afternoon,

Evening

};

class Test

{ static void WriteGreeting(TimeofDay timeofDay)

{

    switch(timeofDay)

    {

        case TimeofDay.Morning:

            Console.WriteLine("good morning");

            break;

        case TimeofDay.Afternoon:

            Console.WriteLine("good afternoon");

            break;

        case TimeofDay.Evening:

            Console.WriteLine("good evening");

            break;

    }

}

static void Main()

{

    WriteGreeting(TimeofDay.Morning);

    WriteGreeting(TimeofDay.Evening);

    WriteGreeting(TimeofDay.Afternoon);

}

}